Final Finish Thickness and tolerances;

"CD" have the parameter thickness for each finish. This should be min and max - not only thickness.

Max can be open = no requirements.

If a standard exist, we should add the parameters from this standard.

Example:

ENIG: IPC-4552: (ENIG exists of Nickel and Gold)

Requirement

 

Min (micrometer)

Max (micrometer)

IPC-4552

Nickel

3

6

 

Gold

0,05

<open>

Customer override

Gold

Min

Max

 

Nickel

Min

Max

Most surface finishes are in Minimum values  - as per IPC-6012 Table 3-3 (cc below)

But, some customers will require an upper limitation:

Requirement

Finish

Min (micrometer)

Max (micrometer)

Cust req.

"b1_lfhasl"

1

40

(this is a typical customer requirement)

 

Additional requirements:

When a customer have a drawing or a document with requirements exceeding what we can cover in CircuitData - should we then have a possibility to add “reference” ? - like this:

"B1_lfhasl"

  • Min 1

  • Max 40

  • Ref file. “nnxxnn”

Ref. file. Should then be a part off the complete Production Data. (Gerber, drill files, drawing etc, read_me)

Please comment!

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  • Could we use this approach here? https://www.circuitdata.org/r/y7f31w

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  • Reading this through, I see that what you want is a change from this:

                {
                  "finish": "b1_lfhasl",
                  "thickness": 4
                }
    

    To this:

                {
                  "finish": "b1_lfhasl",
                  "thickness_min": 1,
                  "thickness_max": 40
                }
    

    And then add the same for Gold, Silver, Paladium, Nickel and Tin. I have no issues adding this to the version that will be released tonight.

    When it comes to the file reference I have more issues with that. What kind of properties is it that can not be added to CD and must be kept in a separate file?

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  • One last question before I update the schema: Will we still need the "thickness" value to specify in a specification? Also: I guess the min and max values should be part of the profiles as well?

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  • Actually, I see that this is already implemented. https://github.com/CircuitData/CircuitData-Language#final_finish Closing this topic.

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